|
Appearance
|
White crystalline powder
|
|
Assay (by NaOH titration)
|
99.5-102%
|
|
Residue on ignition (at 800°C)
|
Max 0.02%
|
|
Insoluble matter (13.2% in water)
|
Max 0.005%
|
|
Chloride (Cl)
|
Max 0.001%
|
|
Oxalate (as C2H2O4) - as per ACS
|
Passes test
|
|
Substance carbonizable by hot H2SO4
|
Passes test
|
|
Lead (Pb)
|
Max 0.0002%
|
|
Iron (Fe)
|
Max 0.0003%
|
|
Sulphate (SO4)
|
Max 0.002%
|
|
Phosphate (PO4)
|
Max 0.001%
|